There's other reasons for the tree fall theory, and it includes suspicion that the tent was moved. Reasons given are that Igor would not setup the tent in such

There's other reasons for the tree fall theory, and it includes suspicion that the tent was moved. Reasons given are that Igor would not setup the tent in such an exposed location when tree shelter was just a kilometer downhill, plus it was off their plotted course, and the contents of the tent seemed a bit disorderly for someone who was a bit of control freak like Igor. That and the injuries, distribution of the hikers and various clothing make more sense if the initial event took place near the cedar tree. I don't know whether that's more plausible than all the other theories where the tent was setup on the slope, but a lot of people have thought the evidence never quite fit. That could be because the search party disturbed the tent and its contents tramping around when they were looking for the hikers. Or it could possibly be because someone knew of the hikers demise some time earlier and staged the tent to cover their butts just in case they were blamed for it.